Being English myself and having had a fair amount of exposure to ETM in various guises, I think these kinds of generalisation and nose thumbing are pretty silly! Yes, ETM, dance music especially and Morris accompaniment in particular can be very lumpen. But it doesn’t have to be and the good stuff isn’t. The English song tradition very significantly overlaps with Irish, Scottish, Welsh, Breton, French and so forth, with many ballads existing in cognate versions in multiple languages and with related melodies, although regional singing styles may vary just like accents. Most have their own beauty. English dance music also varies regionally, as do the styles of playing it - Northumbria being the most obviously distinct. Since the 1970s, particularly influenced by Blowzabella, there has been a significant (but not uniform or overwhelming) style trend in interpretation of English instrumental music that reflects both Early Music (David Munrow etc.) and French trad ways of approaching tunes, (availability of good continental accordions/melodeons and the revival of bagpipes and hurdy gurdies in playing this music was important) and that has produced many lovely, highly listenable, flowing but rhythmically strong performances and recordings. Think Andy Cutting, for example. That trend I believe played a large part in reviving ETM when the lumpen aspect was a bad joke and many English players (like myself, yes!) were turning to the apparently greater, or at least better represented, more accessible and more facile (to the listener) pleasures of Celtic music - it may well not reflect a true continuous tradition, but it sure made something worthwhile of the material which has now become in itself a new living tradition growing out of those roots. That said, I’ve met old-timers in backwoods Gloucestershire pumping out lumpy old morris tunes on 1-row 4-stop melodeons absolutely wonderfully - the ETM equivalent of ITM “Old Geezers”. Of course it is different from mainstream ITM, but so what? I wouldn’t say either was better than the other, nor that anyone has to like both, but again, so what? There are many very fine younger ETM musicians playing to extremely high standards. I’d concede that the average general standard of musical accomplishment among Irish and probably Scottish players, young or old, who are actively interested in their native traditions (and the majority are not, sadly) is probably higher than among their English (or Welsh) counterparts (a more useful generalisation), as indeed is the level of interest in the populations at large. The fact that ETM and WTM are more revivalist than strong continuous traditions when compared to ITM and STM both reflects the histories and social trends of the different nations and is reflected in the current participation and the standards thereof. Many of the ITM “Old Geezers” that some folk here rave about are, to my ears, unlistenably poor performers, though they have some use as archival sources of tunes and regional style. Many otherwise competent ETM players fail to understand ITM and think it is all incredibly fast, so if they try to play it at all, they play it thus, and murder it. ETM is maybe less “twiddly”, but ranges of tempi are probably pretty similar to ITM, and a surprisingly high proportion of the repertory, just like the songs, crops up in both ITM and ETM (and/or STM or WTM) maybe under different names and in variant versions, to an extent that determining national or regional “origin” is often not possible. There is so much in common, and surely we all would prefer to see ongoing popular participation in all the nations in their own traditions than otherwise? So why knock lumps off each other? Recognise and value both the links and commonalities as well as the variances and differences! This is ALL N.W. European music growing out of common, general N.W. European Renaissance roots in terms of dance forms, meters, modes and melodies.
I’ll breath again now! The above is a bit of a scattergun outpouring of related thoughts rather than a well organised thesis, but…